Jquery Difference .html(“”)vs .empty()

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参见英文答案 > What’s the difference between jQuery.fn.empty() and jQuery.fn.html(”)?3
> JavaScript/jQuery html(null) vs html(”)2
在Jquery中有什么区别?
$('#divid').html("");

$('#divid').empty();

在jQuery.js内部都做相同的操作吗?

哪一个更好使用.

解决方法

T认为.empty()更快.这是.empty()的jQuery源代码
empty: function() {
for ( var i = 0,elem; (elem = this[i]) != null; i++ ) {
    // Remove element nodes and prevent memory leaks
    if ( elem.nodeType === 1 ) {
        jQuery.cleanData( elem.getElementsByTagName("*") );
    }

    // Remove any remaining nodes
    while ( elem.firstChild ) {
        elem.removeChild( elem.firstChild );
    }
}

return this; }

而这是jQuery .html(“”)源码:

html: function( value ) {
if ( value === undefined ) {
    return this[0] && this[0].nodeType === 1 ?
        this[0].innerHTML.replace(rinlinejQuery,"") :
        null;

// See if we can take a shortcut and just use innerHTML
} else if ( typeof value === "string" && !rnocache.test( value ) &&
    (jQuery.support.leadingWhitespace || !rleadingWhitespace.test( value )) &&
    !wrapMap[ (rtagName.exec( value ) || ["",""])[1].toLowerCase() ] ) {

    value = value.replace(rxhtmlTag,"<$1></$2>");

    try {
        for ( var i = 0,l = this.length; i < l; i++ ) {
            // Remove element nodes and prevent memory leaks
            if ( this[i].nodeType === 1 ) {
                jQuery.cleanData( this[i].getElementsByTagName("*") );
                this[i].innerHTML = value;
            }
        }

    // If using innerHTML throws an exception,use the fallback method
    } catch(e) {
        this.empty().append( value );
    }

} else if ( jQuery.isFunction( value ) ) {
    this.each(function(i){
        var self = jQuery( this );

        self.html( value.call(this,i,self.html()) );
    });

} else {
    this.empty().append( value );
}

return this; }

很清楚,你可以选择最好的.

原文链接:https://www.f2er.com/jquery/180417.html

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